C3123223313331322121111331333133313231333132333133313233223313222211   >>    C312322331333132212111133133313331323133313233313331323322331322221   <<    C3123223313331322121111331333133313231333132333133313233223313222213   >>      C3123223313331322121111331333133313231333132333133313233223313222212   >>